with_accept_first_mouse takes behavior of first initalized window

[grant0417]

The behavior of with_accept_first_mouse should apply per webview but it actually a global value due to how it is defined in code, the class is only initialized once when the first webview is created so any subsequent windows created also inherit the value.

https://github.com/tauri-apps/wry/blob/c7cd108c2e764457105920d191cf82e890d465d1/src/webview/wkwebview/mod.rs#LL267C8-L267C8